Remove some old debris

GPU/GLES/DrawEngineGLES.cpp

@@ -351,8 +351,6 @@ void DrawEngineGLES::Flush() {
 		params.texCache = textureCache_;
 		params.allowClear = true;  // Clear in OpenGL respects scissor rects, so we'll use it.
 		params.allowSeparateAlphaClear = true;
-		params.flippedY = framebufferManager_->UseBufferedRendering();
-		params.usesHalfZ = false;
 
 		// We need correct viewport values in gstate_c already.
 		if (gstate_c.IsDirty(DIRTY_VIEWPORTSCISSOR_STATE)) {